Plasma Arc Welding (PAW)

The principle of plasma arc welding (PAW) is similar to that of gas tungsten arc welding (GTAW). The difference is that the structure of the torch. Plasma arc welding (PAW) using a shrink-shaped nozzle, using two supply systems, one is ionized gas, the other is shielding. The plasma beam through the shrink-shaped nozzle, the heat concentration, that can get deeper penetration、higher melting rate and welding speed. The HAZ (Heat Affected Zone) of weld bead is relatively small compared with GTAW.